155297 has 4 divisors (see below), whose sum is σ = 156996. Its totient is φ = 153600.

The previous prime is 155291. The next prime is 155299. The reversal of 155297 is 792551.

155297 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 126736 + 28561 = 356^2 + 169^2 .

It is a cyclic number.

It is not a de Polignac number, because 155297 - 2¹² = 151201 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (155291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 704 + ... + 897.

It is an arithmetic number, because the mean of its divisors is an integer number (39249).

2¹⁵⁵²⁹⁷ is an apocalyptic number.

It is an amenable number.

155297 is a deficient number, since it is larger than the sum of its proper divisors (1699).

155297 is an equidigital number, since it uses as much as digits as its factorization.

155297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698.

The product of its digits is 3150, while the sum is 29.

The square root of 155297 is about 394.0774035643. The cubic root of 155297 is about 53.7511411332.

It can be divided in two parts, 1552 and 97, that multiplied together give a square (150544 = 388²).

The spelling of 155297 in words is "one hundred fifty-five thousand, two hundred ninety-seven".